The structure is similar to that of a flange coupling, and a column pin with an elastic ring is used instead of the connecting bolt. The elastic coupling has a simple structure, easy manufacturing, and does not require lubrication. The elastic ring is easy to replace, and it has the ability to compensate for the relative deviation of the two axes, as well as vibration reduction and buffering performance. It is suitable for frequent forward and reverse rotation, frequent starting, and high speed situations. It can be seen as a simplified elastic ring column pin coupling.

To prevent the elastic component from slipping out, retaining rings are installed at both ends, which have the ability to absorb vibration and compensate for axial displacement. They are commonly used for large axial displacement. The pin is inserted into two sections of quenched steel casing and is cut off when overloaded. This type of coupling is due to unstable mechanical properties of the pin material and manufacturing dimensional errors. After the pin of the elastic coupling is cut off, it cannot automatically restore its working ability.

Due to its simple base structure, it is often used in machines with minimal overload. Elastic couplings, as a commonly used mechanical transmission component, have good resistance performance and displacement compensation performance. They are commonly used to adjust the natural frequency of shaft systems, attenuate vibration transmission, reduce torsional vibration amplitude, and compensate for radial and axial displacement of shaft systems. Therefore, couplings are widely used in ships, lifting, transportation, petroleum, chemical, transportation, and other fields.

The main factors causing imbalanced transmission shafts are self factors and external factors. Self factors are mainly divided into the compensation ability of rubber joints and the stiffness changes of rubber joints. External factors are mainly divided into misalignment during coupling installation and abnormal impacts caused by external loads. The transmission shaft is formed by bonding the metal flanges at both ends with the fiberglass tube in the middle. During the bonding process, it can cause the flanges at both ends to have different shafts from the fiberglass tube in the middle.